Thread overview
GDC compilation bloat?
September 08
Maybe I'm missing something, but the binary size that GDC outputs on compilation, for a very simple Hello World example, is very large, even after stripping it.

Comparison between DMD and GDC, all after stripping, plus compilation commands:

dmd -mcpu=native -O -release -inline -boundscheck=off -of=main main.d
669 KiB

gdc -frelease -march=native -O3 -pipe -fstack-protector-strong -fno-plt -o main main.d
1.4 MiB

Why are they so different? Is that how large GDC produced binaries usually are?
September 08
On 8 September 2018 at 09:40, Kyle De'Vir via D.gnu <d.gnu@puremagic.com> wrote:
> Maybe I'm missing something, but the binary size that GDC outputs on compilation, for a very simple Hello World example, is very large, even after stripping it.
>
> Comparison between DMD and GDC, all after stripping, plus compilation commands:
>
> dmd -mcpu=native -O -release -inline -boundscheck=off -of=main main.d 669 KiB
>
> gdc -frelease -march=native -O3 -pipe -fstack-protector-strong -fno-plt -o
> main main.d
> 1.4 MiB
>
> Why are they so different? Is that how large GDC produced binaries usually are?

The runtime makes use of libgcc, backtrace and atomic libraries that dmd wouldn't have.

I'd consider it quite safe to build with -shared-libphobos so you don't have all dependencies pulled in statically.
September 08
On Saturday, 8 September 2018 at 07:55:49 UTC, Iain Buclaw wrote:
> On 8 September 2018 at 09:40, Kyle De'Vir via D.gnu <d.gnu@puremagic.com> wrote:
> The runtime makes use of libgcc, backtrace and atomic libraries that dmd wouldn't have.
>
> I'd consider it quite safe to build with -shared-libphobos so you don't have all dependencies pulled in statically.

Ah, now I see! Seems obvious now. Thank you! :)
September 08
On Saturday, 8 September 2018 at 07:55:49 UTC, Iain Buclaw wrote:
> -shared-libphobos

Also, it would be nice to officially document this somewhere. Or is still considered an unstable feature? LDC seems to dynamically link by default, now that I examine it.
September 09
On Saturday, 8 September 2018 at 14:44:36 UTC, Kyle De'Vir wrote:
> Also, it would be nice to officially document this somewhere. Or is still considered an unstable feature? LDC seems to dynamically link by default, now that I examine it.

LDC as shipped in the upstream binary packages doesn't link shared libraries by default, but some distros might be specifying `-link-defaultlib-shared` in the ldc2.conf they ship.

 — David
September 12
On Sunday, 9 September 2018 at 18:11:53 UTC, David Nadlinger wrote:
> LDC as shipped in the upstream binary packages doesn't link shared libraries by default, but some distros might be specifying `-link-defaultlib-shared` in the ldc2.conf they ship.
>
>  — David

Hi David,

I checked out my distro's LDC config defaults, and it indeed specifies that option.

Is there an equivalent configuration option for GDC?